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April 18, 2018 14:47
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html/css/js drag and drop reactions; implemented register/unregister trigger event listener
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| function DragTagOperator(){ | |
| var position = {}; | |
| var dispatcher = null; | |
| var args = {'root':'header'}; | |
| var events = { | |
| 'drag-register':(data) => {this.register(data)} | |
| ,'drag-unregister':(data) => {this.unregister(data)} | |
| }; | |
| this.decorate = function(opts){ | |
| for (var key in opts){ | |
| if(args.hasOwnProperty(key)){ | |
| args[key] = opts[key]; | |
| } | |
| } | |
| return this; | |
| } | |
| this.create = function(){ | |
| dispatcher = new V13wEv3ntD1spatch3r({'events':Object.keys(events),'issues':Object.values(events)}).onRegister(); | |
| return this; | |
| } | |
| this.register = function(data){ | |
| if(!args.hasOwnProperty(data.tag)){ | |
| var element = $(data.tag); | |
| element.on('mousedown',click); | |
| position[element.attr('id')] = [element.css('left'),element.css('top'),0,0]; | |
| } | |
| return this; | |
| } | |
| this.unregister = function(data){ | |
| if(args.hasOwnProperty(data.tag)){ | |
| var element = $(data.tag); | |
| header.off('mousedown'); | |
| delete position[data.tag]; | |
| } | |
| return this; | |
| } | |
| function click(evt) { | |
| var element = $(evt.target).parent() | |
| pos = position[element.attr('id')] | |
| evt = evt || window.event; | |
| pos[2] = evt.clientX; | |
| pos[3] = evt.clientY; | |
| var header = $(args.root) | |
| header.on('mousemove',function(evt){move(evt,element,pos);}) | |
| header.on('mouseup',close) | |
| } | |
| function move(evt,element,pos){ | |
| evt = evt || window.event; | |
| pos[0] = pos[2] - evt.clientX; | |
| pos[1] = pos[3] - evt.clientY; | |
| pos[2] = evt.clientX; | |
| pos[3] = evt.clientY; | |
| var vx = element.css('top').replace('px','')-pos[1] | |
| var vy = element.css('left').replace('px','')-pos[0] | |
| element.css({'top':vx+"px",'left':vy+"px"}); | |
| } | |
| function close(evt) { | |
| var header = $(args.root); | |
| header.off('mousemove'); | |
| header.off('mouseup'); | |
| } | |
| } |
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| var operator = DragTagOperator().create(); | |
| operator.register({'tag':'item#drag-0'}); | |
| $('body').trigger('drag-register',{'call':'drag-register','id':'doc-load','tag':'item#drag-0'}); |
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